Before you take the vehicle off the lot, document what it looks like: any scratches, dings, or significant damage. If the rental place missed something done by a previous driver, you can prove it wasn't you.

Make sure the company is clear about how they bill electronic tolls and when you can expect a bill. This should be in writing.

Sometimes, you may have to pay for the cars' built-in transponder along with the tolls you rack up. That can add more fees to your car rental. If you don't ask about when you can expect those bills, you may end up with a late one and the responsibility to pay it will be all yours.